Why does hdparm return 2 differing results when AHCI is enabled and disabled?
Clash Royale CLAN TAG#URR8PPP
When invoking the hdparm command to securely erase devices e.g. ATA SECURE ERASE, the output hdparm -I /dev/sda and hdparm -I /dev/sdb differ with AHCI enabled and disabled.
Both devices are SATA hard drives.
Establishing state
- Both /dev/sda and /dev/sdb have the data & power cable plugged in
- The device boots with a Linux LiveCD
- AHCI is disabled
- When the command
hdparm -I /dev/sdaandhdparm -I /dev/sdbis run, both drives appear as frozen.
The following steps are taken in an attempt to 'unfreeze' the drive.
- Both /dev/sda and /dev/sdb only have the data cable plugged in. The power cable is not plugged in.
- AHCI remains disabled.
- Boot the device with a Linux LiveCD.
- Once booted, both the devices have the power cables plugged in.
- When the command
hdparm -I /dev/sdaandhdparm -I /dev/sdbis run, the former displays a frozen state and the latter as not frozen.
The following steps are taken to 'unfreeze' /dev/sda
- The data cable remains plugged in for /dev/sda
- AHCI is enabled.
- Boot the device with a Linux LiveCD
- Once booted, the power cable is plugged into /dev/sda
- When the command
hdparm -I /dev/sdais run, the drive is no longer frozen.
Why would enabling AHCI affect /dev/sda whist disabling AHCI not affect /dev/sdb when 'unfreezing' the devices?
hard-disk hardware sata hdparm
asked Dec 28 '18 at 2:46
MotivatedMotivated
1616
add a comment |
When invoking the hdparm command to securely erase devices e.g. ATA SECURE ERASE, the output hdparm -I /dev/sda and hdparm -I /dev/sdb differ with AHCI enabled and disabled.
Both devices are SATA hard drives.
Establishing state
- Both /dev/sda and /dev/sdb have the data & power cable plugged in
- The device boots with a Linux LiveCD
- AHCI is disabled
- When the command
hdparm -I /dev/sdaandhdparm -I /dev/sdbis run, both drives appear as frozen.
The following steps are taken in an attempt to 'unfreeze' the drive.
- Both /dev/sda and /dev/sdb only have the data cable plugged in. The power cable is not plugged in.
- AHCI remains disabled.
- Boot the device with a Linux LiveCD.
- Once booted, both the devices have the power cables plugged in.
- When the command
hdparm -I /dev/sdaandhdparm -I /dev/sdbis run, the former displays a frozen state and the latter as not frozen.
The following steps are taken to 'unfreeze' /dev/sda
- The data cable remains plugged in for /dev/sda
- AHCI is enabled.
- Boot the device with a Linux LiveCD
- Once booted, the power cable is plugged into /dev/sda
- When the command
hdparm -I /dev/sdais run, the drive is no longer frozen.
Why would enabling AHCI affect /dev/sda whist disabling AHCI not affect /dev/sdb when 'unfreezing' the devices?
hard-disk hardware sata hdparm
asked Dec 28 '18 at 2:46
MotivatedMotivated
1616
add a comment |
When invoking the hdparm command to securely erase devices e.g. ATA SECURE ERASE, the output hdparm -I /dev/sda and hdparm -I /dev/sdb differ with AHCI enabled and disabled.
Both devices are SATA hard drives.
Establishing state
- Both /dev/sda and /dev/sdb have the data & power cable plugged in
- The device boots with a Linux LiveCD
- AHCI is disabled
- When the command
hdparm -I /dev/sdaandhdparm -I /dev/sdbis run, both drives appear as frozen.
The following steps are taken in an attempt to 'unfreeze' the drive.
- Both /dev/sda and /dev/sdb only have the data cable plugged in. The power cable is not plugged in.
- AHCI remains disabled.
- Boot the device with a Linux LiveCD.
- Once booted, both the devices have the power cables plugged in.
- When the command
hdparm -I /dev/sdaandhdparm -I /dev/sdbis run, the former displays a frozen state and the latter as not frozen.
The following steps are taken to 'unfreeze' /dev/sda
- The data cable remains plugged in for /dev/sda
- AHCI is enabled.
- Boot the device with a Linux LiveCD
- Once booted, the power cable is plugged into /dev/sda
- When the command
hdparm -I /dev/sdais run, the drive is no longer frozen.
Why would enabling AHCI affect /dev/sda whist disabling AHCI not affect /dev/sdb when 'unfreezing' the devices?
hard-disk hardware sata hdparm
asked Dec 28 '18 at 2:46
MotivatedMotivated
1616
When invoking the hdparm command to securely erase devices e.g. ATA SECURE ERASE, the output hdparm -I /dev/sda and hdparm -I /dev/sdb differ with AHCI enabled and disabled.
Both devices are SATA hard drives.
Establishing state
- Both /dev/sda and /dev/sdb have the data & power cable plugged in
- The device boots with a Linux LiveCD
- AHCI is disabled
- When the command
hdparm -I /dev/sdaandhdparm -I /dev/sdbis run, both drives appear as frozen.
The following steps are taken in an attempt to 'unfreeze' the drive.
- Both /dev/sda and /dev/sdb only have the data cable plugged in. The power cable is not plugged in.
- AHCI remains disabled.
- Boot the device with a Linux LiveCD.
- Once booted, both the devices have the power cables plugged in.
- When the command
hdparm -I /dev/sdaandhdparm -I /dev/sdbis run, the former displays a frozen state and the latter as not frozen.
The following steps are taken to 'unfreeze' /dev/sda
- The data cable remains plugged in for /dev/sda
- AHCI is enabled.
- Boot the device with a Linux LiveCD
- Once booted, the power cable is plugged into /dev/sda
- When the command
hdparm -I /dev/sdais run, the drive is no longer frozen.
Why would enabling AHCI affect /dev/sda whist disabling AHCI not affect /dev/sdb when 'unfreezing' the devices?
hard-disk hardware sata hdparm
hard-disk hardware sata hdparm
asked Dec 28 '18 at 2:46
MotivatedMotivated
1616
asked Dec 28 '18 at 2:46
MotivatedMotivated
1616
edited Dec 28 '18 at 2:57
Motivated
asked Dec 28 '18 at 2:46
MotivatedMotivated
1616
asked Dec 28 '18 at 2:46
MotivatedMotivated
1616
asked Dec 28 '18 at 2:46
MotivatedMotivated
1616
1616
add a comment |
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